Sigmoidoscope



FIG. 1 is a perspective view of a sigmoidoscope of my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a rear view;

FIG. 4 is a top view;

FIG. 5 is a view of the opposite side of FIG. 2;

FIG. 6 is a front view; and

FIG. 7 is a bottom view.

The tube of the sigmoidoscope is of indeterminate length and has been broken away in the several views for convenience of illustration only. 

The ornamental design for a sigmoidoscope, as shown and described. 